How many Puranas ?

There are 18 Puranas.

They are:

1. Sri Vishnu Purana (Given by Parasara Maharishi, father of Shri Vayasar Maharishi), contains 6000 Slokas in Sanskrit
2. Srimath Bhagawatham, contains 18,000 slokas
3. Padma Purana, contains 59,500 slokas
4. Varaha Purana, contains 24,000 slokas
5. Brmha Purana, contains 10,000 slokas
6. Saiva Purana, contains 24,000 slokas
7. Narashima Purana, contains 25,000 slokas
8. Markandaya Purana, contains 8,000 slokas
9. Agni Purana, contains 15,400 slokas
10. Bavishiya Purana, contains 14,500 slokas
11. Brmha Vaivartha Purana, contains 18,000 slokas
12. Linga Purana, contains 11,000 slokas
13. Skanda Purana, contains 81,100 slokas
14. Vamana Purana, contains 10,000 slokas
15. Kurma Purana,contains 17,000 slokas
16. Matsya Purana, contains 17,000 slokas
17. Karuda Purana, contains 19,000 slokas
18. Brmhanda Purana, contains 12,000 slokas

All the seventeen puranas except Sri Vishnu Purana were given by Shri Vyasar Maharishi.

In addition to the above 18 puranas there are also sub Puranas.